Antiskid device.



e. T. HECKMANN. ANTISKID DEVICE.

APPLICATION FILED NOV.10. I914.

1,1 60,890. Patented Nov. 16, 1915.

770/?IVEYS GEORGE '1. HECKMANN, OF ST. LOUTS, MISSOURI.

ANTISKID DEVICE.

To all whom it may concern Be it known that I, GEORGE T. HECK- MANN, acitizen of the United States, and a resident of St. Louis, Missouri,have'invented a new and Improved Antiskid Device, of which the followingis a full, clear, and exact description.

- My invention relates to anti-skid devices for tires, and particularlyto the type in- "olving the use of chains arranged to be securedtransversely of a tire by clamp means engaging the spokes of the wheel.

Further objects of my invention are to provide a clamp for the purposeindicated, in whicha clampscrew to tighten or loosen the jaws of theclamp is prevented from turning one clamp jaw relatively to another,whereby to facilitate the tightening and loosening of the clamp by theuse of one hand only.

Afurther object of the invention is to so arrange the clamp elementsthat the clamp may be manipulated from the outside of the wheel; to soconstruct and arrange the parts of the clamp and chain connecting meansthat they will afford no undesirable projecting elements laterally ofthe wheel; to provide for the convenient detachment of the chain whendesired, and secure fasten- 'ing when in position, and to provide aconnecting means for the chain which will permit the chain to besustained by the clamp sufficiently loose on the tire and permit itsmovement on the tread.

The invention also has for its object to improve devices of theindicated character, in various particulars, to the end that strengthmay be obtained with light construction of parts, as well as economy ofmanufacture and convenience in applying and adjusting the device.

The invention will be more particularly explained in the specificdescription following.

Reference is had to the accompanying drawings forming part of thisspecification, in'which similar characters of reference indicatecorresponding parts in all the views, and in which:

Figure 1 is a side view of an anti-skidding device embodying myinvention, showing the same applied, the View being taken at the outsideof the wheel parts; Fig. 2 is a transverse section, on the line 2-2Fig. 1. Fig. 3 is a perspective view of the improvedclamp, and Fig. 4:is a perspective view of the im- Specification of Letters Patent.

proved snap link for detachably connecting the chain with the clamp.

The invention is applicable to any tire A, here conventionally shown inconnection with a clencher rim B and felly C, a portion of a spoke Bbeing also indicated.

The clamp of my improved device comprises jaws 10, 11, the one beingformed with a rigid shank 12 which is enlarged to receive and affordguided movement for the reduced shank 13 of the opposite jaw 11. Theenlarged shank is formed with a central opening to produce a lightconstruction and presenting opposite spaced sides 12, 12 The rigid shank13 of the opposite jaw is of reduced thickness, and is non-circular incross section, and in the arm 12 of the enlarged shank a non-circulartransverse opening 12 is formed receiving and conforming to the reducednon-circular portion of the other shank. The said reduced shankterminates in a threaded spindle 15 which extends through an opening inthe arm 12 of the enlarged shank in alinement with the non-circularopening. The threaded spindle extends through the clamp to the outerside, and it receives a nut 16, preferably a wing nut which bearsagainst the back of the adjacent shank whereby to clamp the jaws on thespoke.

As will be apparent particularly from Figs. 1 and 3, the spindle 15 andits nut 16 are disposed at the outside of the wheel, the shanks of thejaws being disposed in crossed form, and the said threaded spindle ofthe one shank being disposed at the outside of the opposite shank. Theresult is that the nut 16 is accessible from the outside of the wheel,so that the jaws may be conveniently adjusted with one hand, thenon-circular shank 13 and the corresponding opening 12 preventing theturning of the jaw 11 relatively to the jaw 10.

To hold the nut 16 in adjusted position, a locking washer 17 may beemployed beneath the nut. As the washer is of known form, it needs nomore particular description.

Each jaw is adapted tojre'ceive an end of a chain 17 whichextends'transversely of the tire. The chain is detachably connected atits ends to the respective jaws through the medium of snap links 18,best shown in Fig. 4, which engage the end links of the chain, andengage loops 19 on the backs of the respective jaws. The links 18 are.in the form of oblong'loops, so that there may be a play Patented Nov.16, 1915. 1 Application filed November 10, 1914. Serial No. 871,326.

link by a transverse pin 22. A plate spring 2 23 maintains the tongue innormal position,

said spring ranging transversely beneath thetcngue adjacent its pivotand presenting a. free end 24. bearing against the tongue at the innerside in an outward direction. The spring is fastened at one'end in aslot 25 in the body of the link at the base of the cheeks 21.

I have found the best results are obtained by permitting the chains tohave movement on the tread of the tire in either directioncircumferentially of the tire. By the described snap links taken inconnection with the loops 19, which are so disposed on the clamp jawsthat said eyes will range lengthwise of the jaws and transversely of thespoke to which the clamp is applied, the movement of the chain'onf thetread of the tire is permitted; at the same time the form of the linkand the clamp presents no pronounced projections laterally of the wheel.

By the described construction it will be 'seen that the device may beapplied and adjusted with convenience, and the form of the clamp permitsof its being manufactured in comparatively light form, while possessingthe necessary strength and durability.

Having thus described my invention, what i I claim as new and desire tosecure by Letters Patent, 1s:

1. In an anti-skid device having a transverse chain, a clamp to securethe ends of the chainto a spoke, said clamp having jaws pr'ovidedwithmeans whereby to connect with the chain and shanks on the jaws saidshanks crossing each other, one shank having a portlon non-clrcular incross section having guided movement in a corresponding site side, theother -jaw having ,a rigid shank formed with a reduced non-circularportion slidable in and corresponding with the non-circular opening ofthe first mentioned shank and terminating in a threaded spindleextending through the said registering opening of the 'othershankto theouter side of the clamp; and a nut-on said threaded spindle engaging theback of the adjacent shank.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE T. HECKMANN.

Witnesses:

HARRY A. WHEELER,

BROSE CHANNUss.

